Hannah Pullen-Blasnik

I am a Ph.D. Candidate, Paul F. Lazarsfeld Fellow, and National Science Foundation Graduate Research Fellow in the Department of Sociology at Columbia University. My work examines the criminal legal system and urban development to understand how political and economic power gets regulated and contested, as well as how algorithms and surveillance technologies alter these dynamics. I use a mixture of quantitative, computational, and qualitative techniques.

I am also the project director on the Criminal Legal Algorithms, Technology, and Expertise (CLATE) project at the Trust Collaboratory, where my recent publication examines how the introduction of DNA analysis software challenges analysts’ authority in the courtroom. I am also a researcher for the Data and Racial Inequality Project and have worked at the Movements against Mass Incarceration Lab at Incite and the Columbia Justice Lab. My 2021 publication with the Pennsylvania Solitary Study found that 1 in 9 Black men in the state are held in solitary confinement by the time they are 32, more than 8 times the risk that white men face.

In my spare time, I volunteer with New York State Assembly Member Zohran Mamdani and City Council Member Tiffany Cab├ín’s offices on interview and data visualization projects around public safety. I have also project managed a research team on algorithmic and technological surveillance with Data for Black Lives and volunteered as a data science consultant for the ACLU of Massachusetts. Before starting my PhD, I worked as a Senior Data Scientist in digital marketing, where I managed big data and machine learning projects in R, Python, PySpark, and SQL.

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